The point is not to take the world's opinion as a guiding star but to go one's way in life and working unerringly, neither depressed by failure nor seduced by applause.
I also had a brother who was like me a musician and a composer. A man of great talent, far more gifted than I. He died very young... he killed himself in the prime of his life.
The longer you live and the more you learn, the more clearly you will feel the difference between the few men who are truly great and the mere virtuosi.